Retired Air Force looking to expand my retirement portfolio into real estate. 

They are coming to your property if you allow them or not (you cannot forbid service animals) Consider the facts: https://www.dogster.com/statistics/pet-travel-statistics-tre....Top 12 Pet Travel Statistics78% of American pet owners travel with their pets each year.54% of cat and dog owners plan to travel with their pet.58% of people would prefer to travel with their pet over a friend or family member.52% of travelers base their travel plans on accommodating pets.About 75% of luxury, mid-scale, and economy hotels allow pets.In 2019, a total of 404,556 animals were transported by airline.Nearly 64% of travelers prefer to travel with pets by car.42.9% of people look for a destination with hiking and fresh air for pet travel.Dogs make up 58% of the pets traveling around the world.37% of owners take shorter vacations because of their pets.10% of travelers have hidden their dogs to travel.27% of dog owners go the extra mile for their pets.

Its my understanding that SF has pretty tight Air BNB restrictions like you have to register and can only rent them a certain number of days a year?

Views, indoor pools, game rooms and proximity to attractions.

Yeah, I'm really disappointed that they removed the Air DNA from the calculators also!!!

After assessor comes out and consults with insurance company, they'll send demo guys out to come do demo work and remove wet drywall, insulation, etc. they'll usually put down dehumidifiers and let the place air out a bit to see what actually needs replacing and what was able to dry out.

There can also be chemicals in the treated lumber that are harmful to the environment.Invest in a good screen or built in door system.  

Can you actually sell your Air BNB as a business?

I have smelled it in the halls and in the other tenants air vents.

Prime LA Beverly hills  Bel air  Prime orange county anything on the ocean. 300k would be average I suspect ..